If You Find A Dryer Sheet in You Mailbox, This May Be Why.
A recent Reddit thread answered the question of why you might spot a dryer sheet in your mailbox. It’s to keep wasps out!
Posting under the name Istrx13, the user explained that the dryer sheets are used to keep yellowjackets and wasps away.
So even if you haven’t found one in your mailbox, maybe it’s worth putting one inside yourself to help your mail carrier (and yourself) out!